<tr th:each="item:${grade_teacher_list}">
    <td th:text="${item.user_name}">Beginner</td>
    <td th:text="${item.type_name}">Beginner</td>
    <td th:text="${item.create_time}">Beginner</td>
    <td>
        <a href="javascript:;" th:onclick="del_teacher([[${item.id}]])" data-id="1" data-opt="del"
           class="layui-btn layui-btn-danger layui-btn-mini">删除</a>
    </td>
</tr>